Centrifugal pump



( No Model.)

B. J. HAWLEY.

OBNTRIPUGAL PUMP.

No. 367 911.- Patented Aug. 9, 1887.

Witness as;

UNITED STATES PATENT OFFICE.

ELI J. HAWLEY, OF MANGHE$TER, VERMONT.

WCENTRIFVLVJG'AL PUMP.

SPECIFICATION forming part of Letters Patent No. 367,911, dated August 9, 1887.

Application filed March 23, 1887.

To (112 whom it may concern:

Be it known that I, ELI J. HAWLEY, a citizen of the United States of America, residing at Manchester, in the county of Bennington and State of Vermont, have invented certain new and useful Improvements in Centrifugal Pumps, of which the following is a specification, reference being had therein to the aceom panying drawings.

My invention relatesto improvements in centrifugal pumps adapted'to pump fluids containing gritty substances, and more particularly to the pump shown and described in Patcut No. 350,362, granted to me on the 5th day of October, 1886.

The invention consists in providing the easing with a removable hard metallic side lining, which will first be described in connection with the accompanying drawings and then clearly pointed out in the claims.

Figure 1 of the drawings is a central section of my improved pump. Fig. 2 is a view of the piston, one side being removed to show the arms and water-ways. Fig. 3 shows the. piston complete. Fig. 4 is a perspective view of the lining that surrounds the periphery of the piston, broken to show its concavity. Fig. 5 is a perspective viewof one of the side linings.

Referring to the drawings, A A represent the casing; 13, the inlet-pipe; G, the piston; D, the piston-shaft; E, thejournal; F, the stuffing-box; G, the removable bearing in the j ournal; g, thelongitudinal groove in the bearing; ,9, the annular chamber, and g the contracted annular opening at the lower end'of the bearing; H, the pipe for admitting water to the groove and I the removable lining surrounding the periphery of the piston. *All of these parts, except the cap-plateof the casing, are constructed in the same manner as the like parts in the pump described in my aforesaid patent.

\Vhilc my annular lining surrounding the periphery of the piston serves its purpose in a highly satisfactory manner and results in an immense saving of expense when the pump is used for pumping mixed sand and water and other gritty substances, I have found in actual practice that a still greater saving may be effected by providing the pump with a remov- Serial No. 232,057. (No model.)

able hard metallic side lining to protect the sides of. the casing from wear occasioned by gritty substances working around to the sides of the piston.

' J represents the side lining, which consists of two cast-metal plates of the same general.

outline as the annular lining. One of the plates is perforated centrally to fit neatly over the end of the removable bearing for the shaft, and the other plate is perforated to fit over the inlet-pipe, as seen in Fig. 1.

The'casing, it will be understood, is made sufficiently wide to receive the side plates on each side of the annular lining; but instead of making the cap-plate Aof the casing straight, as in the patented pump above alluded to, I recess its inner side, as seen at a, to a depth just sufficient to receive the lining-plate on that side, and thus reduce the width of the main portion of the casing to that extent. The

manner of putting these plates in place and removing them is so obvious as to render dcscriptionunnecessary, they being held in position in the casing simply by the annular lining and the cap-plate.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a centrifugal pump, the combination, with the casing, the removable cap-plate, and a removable annular lining, of side linings consisting of two plates of hard metal, one of which is placed loosely on each side of the annular lining,'and all of said linings being held in place by the cap-plate of the casing.

2. In a centrifugal pump having a recessed cap-plate, the combination,with the casing, the

removable recessed cap-plate,and a removable annular concave-faced lining, of side linings consisting of two plates of hard metal, one of which is'placcd loosely in the casing on each side of the annular lining, and all of said linings being held in place by the cap-plate of the casing, all asdescribed, and for the purpose set forth.

In testimony whereof I ZlffiX my signature in presence of two witnesses.

ELI J. H AVVLEY. Witnesses:

HELEN M. BLACK, J mans P. BLACK. 

